Makita DTW181ZK Instruction Manual

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10 ENGLISHThe hook is convenient for temporarily hanging the tool.This can be installed on either side of the tool. To installthe hook, insert it into a groove in the tool housing oneither side and then secure it with a screw. To remove,loosen the screw and then take it out.OPERATIONCAUTION: Always insert the battery cartridgeall the way until it locks in place. If you can see thered indicator on the upper side of the button, it is notlocked completely. Insert it fully until the red indicatorcannot be seen. If not, it may accidentally fall out ofthe tool, causing injury to you or someone aroundyou.► Fig.12Hold the tool firmly and place the impact socket overthe bolt or nut. Turn the tool on and fasten for the properfastening time.The proper fastening torque may differ depending uponthe kind or size of the bolt, the material of the workpieceto be fastened, etc. The relation between fasteningtorque and fastening time is shown in the figures.Proper fastening torque for standard bolt1Nm(kgfcm)220(200)40(410)60(610)80(820)100(1020)120(1220)140(1430)160(1630)180(1840)0 1 2 3M16M14M12M10M8M8M10M12M14M161. Fastening time (second) 2. Fastening torqueProper fastening torque for high tensile bolt0 1 2 32N•m(kgf•cm)120(200)40(410)60(610)80(820)100(1020)120(1220)140(1430)160(1630)M12M10M8M12M10M8180(1840)1. Fastening time (second) 2. Fastening torqueNOTE: Hold the tool pointed straight at the bolt or nut.NOTE: Excessive fastening torque may damage thebolt/nut or impact socket. Before starting your job,always perform a test operation to determine theproper fastening time for your bolt or nut.NOTE: If the tool is operated continuously until thebattery cartridge has discharged, allow the tool to restfor 15 minutes before proceeding with a fresh batterycartridge.The fastening torque is affected by a wide variety offactors including the following. After fastening, alwayscheck the torque with a torque wrench.1. When the battery cartridge is discharged almostcompletely, voltage will drop and the fasteningtorque will be reduced.2. Impact socket• Failure to use the correct size impact socketwill cause a reduction in the fastening torque.• A worn impact socket (wear on the hex endor square end) will cause a reduction in thefastening torque.3. Bolt• Even though the torque coefficient and theclass of bolt are the same, the proper fasten-ing torque will differ according to the diame-ter of bolt.• Even though the diameters of bolts are thesame, the proper fastening torque will differaccording to the torque coefficient, the classof bolt and the bolt length.4. The use of the universal joint or the extensionbar somewhat reduces the fastening force of theimpact wrench. Compensate by fastening for alonger period of time.